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Search took 0.02 seconds. Search: Posts Made By: Focus-Ak
Forum: Aerodynamics 11-15-2017, 04:48 PM
Replies: 13
Views: 2,729
Posted By Focus-Ak
The low end of CdA -- Wow, I want one

Check out these velomobiles. Many aerodynamic features that have been discussed one way or another in this forum. There are three- and four-wheel models, from several manufacturers. Here are some...
Forum: Aerodynamics 09-20-2016, 05:20 AM
Replies: 3
Views: 1,003
Posted By Focus-Ak
What is the CdA of this mess?

What do you think is the CdA penalty for this mess?

20582
Forum: General Efficiency Discussion 06-28-2016, 02:44 PM
Replies: 11
Views: 2,118
Posted By Focus-Ak
Vehicle GHGs rising despite CAFE standards. What's the solution?

GHGs are rising despite fuel economy standards. What's the solution?

ClimateWire
Camille von Kaenel, E&E reporter
June 28, 2016

TRANSPORTATION: GHGs are rising despite fuel economy standards....
Forum: Aerodynamics 04-26-2016, 05:18 PM
Replies: 38
Views: 5,220
Posted By Focus-Ak
Roof rack fuel penalty nationwide (US)

(The abstract linked in the story is here: Fuel consumption impacts of auto roof racks (http://www.sciencedirect.com/science/article/pii/S0301421516300714))

Roof racks create drag, cost gas --...
Forum: Instrumentation 02-06-2016, 05:14 PM
Replies: 0
Views: 1,175
Posted By Focus-Ak
Successfully using multiple OBD-II instruments

It has been generally reported that multiple OBD-II instruments, and the UltraGauge in particular, often don't work when connected to the OBD-II port with a Y-splitter cable.

I just experimented,...
Forum: General Efficiency Discussion 12-30-2015, 12:03 AM
Replies: 2
Views: 1,003
Posted By Focus-Ak
Fuel efficiency of vehicles on US roads: 1923-2006

Sivak M., Tsimhoni O. (2009).
Fuel efficiency of vehicles on US roads: 1923-2006.
Energy Policy. 37:8:pp.3168-3170.
Web: Fuel efficiency of vehicles on US roads: 1923?2006...
Forum: The Lounge 10-25-2015, 09:10 PM
Replies: 3
Views: 994
Posted By Focus-Ak
Renaissance Paintings recreated with auto mechanics

This is too funny ...

Auto Mechanics Hilariously Recreate Renaissance Paintings

Auto Mechanics Hilariously Recreate Renaissance Paintings | Bored Panda...
Forum: EcoModding Central 10-01-2015, 04:12 AM
Replies: 16
Views: 2,256
Posted By Focus-Ak
Some places in Europe there are signs to switch...

Some places in Europe there are signs to switch off the engine, and then a light a few seconds ahead of the green light, cuing when to restart. EcoModders could lobby for this their own communities....
Forum: Aerodynamics 09-25-2015, 07:07 AM
Replies: 4,211
Views: 1,322,010
Posted By Focus-Ak
http://ecomodder.com/forum/member-focus-ak-albums-...

http://ecomodder.com/forum/member-focus-ak-albums-misc.-picture7017-rescued-film-project.jpg
Forum: EcoModding Central 09-17-2015, 01:35 AM
Replies: 133
Views: 53,685
Posted By Focus-Ak
Here is the permalink to the #130 post: ...

Here is the permalink to the #130 post:

http://ecomodder.com/forum/showthread.php/aeromodded-civic-vx-72mpg-image-heavy-28815-4.html#post427797

I see on that page that those covers were...
Forum: EcoModding Central 09-14-2015, 11:27 PM
Replies: 422
Views: 96,995
Posted By Focus-Ak
Subscribe.

Subscribe.
Forum: DIY / How-to 09-13-2015, 01:59 AM
Replies: 11
Views: 4,042
Posted By Focus-Ak
Making an ABS upper grille cover, with compound curves

Here is how-to for making a template for an upper grille that has compound curves (curves in two directions), and some notes on working with ABS sheet material for the actual cover.

The info here...
Forum: General Efficiency Discussion 08-25-2015, 02:09 AM
Replies: 18
Views: 3,833
Posted By Focus-Ak
I changed one route I drive, because although the...

I changed one route I drive, because although the MPG are lower the distance is less, resulting in less gas consumption. So my average score in nothing to brag about, but lower fuel consumption is...
Forum: Aerodynamics 08-19-2015, 06:02 PM
Replies: 21
Views: 3,693
Posted By Focus-Ak
I agree in large part. And the data...

I agree in large part.



And the data seems to be there in the tables, if it can be teased out. In the Cd column for some of the tests the Cd is shown reduced from 3.42 to 3.0, 3.1 or 3.2.
...
Forum: Aerodynamics 08-19-2015, 04:47 AM
Replies: 21
Views: 3,693
Posted By Focus-Ak
A paper on aft-end underbody diffusers

I have found a few threads here about projects for making underbody diffusers. Here is a dissertation I found that may be of interest to some ecomodders:

"An experimental study of automotive...
Forum: General Efficiency Discussion 04-05-2015, 05:51 PM
Replies: 56
Views: 7,004
Posted By Focus-Ak
Fighting for vehicle owners’ rights to inspect the code that runs their vehicles

See: https://www.eff.org/deeplinks/2015/04/automakers-say-you-dont-really-own-your-car

"EFF [Electronic Frontier Foundation] is fighting for vehicle owners’ rights to inspect the code that runs...
Forum: EcoModding Central 03-20-2015, 02:18 AM
Replies: 112
Views: 15,718
Posted By Focus-Ak
I advise only a minimal block for now. What many...

I advise only a minimal block for now. What many people don't realize is that the dashboard temperature gauge isn't accurate at all. The needle will be vertical over a wide range of coolant...
Forum: EcoModding Central 02-24-2015, 12:07 AM
Replies: 4
Views: 1,121
Posted By Focus-Ak
EGR supplied oil heater, for faster warmup

There are several threads in this forum on possible ways to make an engine warm-up faster, so this paper may be of interest (free download). It uses heat from the exhaust gas recirculation (EGR)...
Forum: Hypermiling / EcoDriver's Ed 01-14-2015, 07:19 PM
Replies: 7
Views: 2,000
Posted By Focus-Ak
BTW, I found these papers through a search for...

BTW, I found these papers through a search for "specific fuel consumption" instead of "brake specific fuel consumption." That gives a lot of interesting hits, most of them aviation related and not of...
Forum: General Efficiency Discussion 01-14-2015, 06:11 PM
Replies: 37
Views: 12,040
Posted By Focus-Ak
Dave, what you say is true. However, what Jeff...

Dave, what you say is true. However, what Jeff proposes is that if the alternator has to be run some of the time but not all of the time, what it is the most advantageous circumstance for having the...
Forum: Hypermiling / EcoDriver's Ed 01-14-2015, 03:11 AM
Replies: 7
Views: 2,000
Posted By Focus-Ak
On Coasting (Two interesting papers)

I have found two interesting papers that seem to provide some answers to frequent questions on Ecomodder about some specific hypermiling techniques, and how those integrate with BSFC (brake specific...
Forum: General Efficiency Discussion 12-31-2014, 10:07 PM
Replies: 37
Views: 12,040
Posted By Focus-Ak
BSFC (brake specific fuel consumption) explained

There is a great explanation of BSFC on this webpage:

"Brake Specific Fuel Consumption: A really useful concept"
by Julian Edgar (2008)
AutoSpeed - Brake Specific Fuel Consumption...
Forum: Aerodynamics 12-31-2014, 08:34 PM
Replies: 4,211
Views: 1,322,010
Posted By Focus-Ak
There are good photos here of the Saab 92...

There are good photos here of the Saab 92 prototype, with full skirting of the front and rear wheels, a production 92 without the skirting, and the 96 and Sonnet models:
The Rise and Fall of Saab -...
Forum: Aerodynamics 12-31-2014, 08:02 PM
Replies: 4,211
Views: 1,322,010
Posted By Focus-Ak
Click on the 1947 link to see the whole profile...

Click on the 1947 link to see the whole profile of the Saab Model 92:
Saab History - Saab Parts USA (http://www.saabparts.com/en-us/usa/the-company/heritage/saab-history/)

Also, although not an...
Forum: Aerodynamics 12-31-2014, 07:59 PM
Replies: 4,211
Views: 1,322,010
Posted By Focus-Ak
Interesting tail-end study of Saabs from...

Interesting tail-end study of Saabs from 1947-2011, in the illustration at the top of this page. I somehow doubt the Cd numbers given in the table, though (no change between the models, from the 92...
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